Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
GREENVILLE PISCATAQUIS 41 1 2.73 flushes/yr 1245 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
7 m
(24 ft) 		2 m
(8 ft) 		25 ha
(62 ac) 		589,213 m3
(478 ac-ft) 		2 km2
(1 mi2)

Secchi Disk Transparency Graphs

Graph Legend: Secchi symbols = average Secchi Disk Transparency Values; tick marks = maximum and minimum values for each year.

## [1] "No 2018 Secchi Disk Transparency Data"

Water Chemistry and Trophic State Parameters

Table Legend:

Color: Color (SPU), Alk: Alkalinity (mg/l CaCO3), SpCon: Specific Conductivity (\(\mu\)S/cm), pH: pH (standard units)

TP = Total Phosphorus (\(\mu\)g/L) – EC: Epilimnion Core, SG: Surface Grab, BG: Bottom Grab, PG: Profile Grab

SDT = Secchi Disk Transparency (m) – Min: minimum value, Avg: average value, Max: maximum value, n: number of months with Secchi readings per year, b: number of times Secchi disk was observed touching the bottom of the lake per year

Chl = Chlorophyll-a (\(\mu\)g/L) – Min: minimum value, Avg: average value, Max: maximum value
Year Color Alk SpCon pH TP-EC TP-SG TP-BG TP-PG SDT-Min SDT-Avg SDT-Max SDT-n SDT-b Chl-Min Chl-Avg Chl-Max
1958 6.0
1987 6.2 43 17 3.4 5.0 5.9 5 1.1 3.1 10.2
1988 5.0 11 2.9 4.1 5.2 5 1.0 4.9 7.6
1991 3.5 3.7 3.8 4
1992 9.0 27 7.0 15 2.8 2.8 2.8 1 5.4 5.4 5.4
1993 2.4 3.3 4.5 5
1998 43 32 3.1 3.1 3.1 1 4.6 4.6 4.6
1999 7.0 37 13 22 2.5 2.6 2.7 1 4.5 4.5 4.5
2011 15 42 2.5 2.5 2.5 1 4.9 4.9 4.9
2013 12 6.8 28 7.1 13 30 2.5 2.5 2.5 1 2.7 2.7 2.7

Lake Chemistry and Trophic Summary Data - Overall Summary Values:

Avg Color Avg Alk Avg SpCon pH Avg TP-EC Avg TP-SG Avg TP-BG Avg TP-PG SDT-Min SDT-Avg SDT-Max SDT-n Chl-Min Chl-Avg Chl-Max
12 6.7 34 7 18 31 2.4 3.3 5.9 2.7 1 4.3 10

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1958-08-11
1987-08-17
1988-08-19
1992-08-31
1999-08-23
2011-08-23
2013-08-20
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 19 8.0 24 8 21 8 20 8.6 22 8.7 22 7.6 22 8.2
1 20 8.5 22 8.6 22 7.6 22 8.2
2 20 8.5 21 8.6 22 7.6 21 8.2
3 20 8.5 20 8.1 22 7.5 21 8.1
4 20 6.8 20 5.9 22 7.5 20 7.3
5 18 7.8 20 9 19 4.3 18 0.8 20 4.4 19 4.8
6 13 0.6 17 0.4 16 0.2 15 0.8 14 0.3
7 13 0.0 18 5 18 8 14 0.1 13 0.2 13 0.6 12 0.3
8 12 0.2 13 0.4

Most recent temperature and dissolved oxygen profile plots

Temperature (°C), Dissolved Oxygen (mg/L)